Ononot — Let A be a 3 \times 4 matrix and B be a 4 \times 3 matrix. T

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Eigenvalues & Eigenvectorsmedium

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Let $A$ be a $3 \times 4$ matrix and $B$ be a $4 \times 3$ matrix. The product $AB$ is $3 \times 3$ and $BA$ is $4 \times 4$ . Which statement must be true about the eigenvalues of $AB$ and $BA$ ?